Cyaniding apparatus.



No. 841,331. PATBNTED JAN. 15, 1907.

W. v. LANDER. Y

CYANIDING APPARATUS.

APPLICATION FILED APR. 27.1906.

1HE Norems News co., WASHINGTON, uA c n Na 841,331'.

wiNTwoR'rH v. LANDER, or NEWTON, Mxs'sAoI-iusnrrs CYAN'IDING. AFPAFiATiJs.l;i`

A.immuunnariipriizaieoa serialraeiaeze.

To all whom it may concernn i Be it known that I, WINTWORTH V. LAN- DER, a citizen of the United States, and a resi-' dent of Newton, in the county of Middlesex and State of Massachusetts, have invented new Aand ,useful VImprovements in Cyaniding tion which is Apparatus, of which the following is a speciiication. p i

, My invention relates to apparatus for cya-V niding ores; and itconsists in improvements in s uch apparatus by which the cyanid proc-` ess 1s carried on with improved eiliciency and economy. Y

In the drawing hereto lannexed there is shown an apparatus embodying. my invenf suited to, thei performance of an improved process invented `by me, which process, hereinbelow described, ,isl the subject ofan application for L etters'fPatent of the United States, Serial o,-1. 3 1;3,924,;iiled by vme concurrently herewith, and .is expressly reserved for claim therein. l

, n has beenfound desirable, if, inieeaaotf essential, to oxygen'ate cyanid 'solution in order'to effectuate the necessary reaction; but this-oxygenatiomso far as I am ,.aware,

has been carried on either during thestage of comminutionor stamping offthe ore itself or in settling-tanks wherein cyanid solution with ore particles in suspension or mixture has `been run. Even though the comminuted ore and solution is running in a mingled stream the ore particles are ,to all practical intents andpurposes submerged, and when they are submerged and out of contact with the air the cyaniding process is virtually suspended, and thus time and efficiency is lost to a very material extent. Moreover, when resort is had to the device of blowing air through the solution in the settling-tanks this mode of procedure adds another item to the time elements in the business and is to this extent wasteful.

By my process herein described the oxygenation of ore in cyanid solution is carried on with substantial continuity during the entire progressi'of the mingled ore and cyanid solution, so that when the final stage is reached and the materials have finished their transit between the terminals of the apparatus the cyaniding process, except for the subsequent recoveries, is completed and time, labor, and auxiliary apparatus saved or dispensed with.

In the drawing hereto annexed I have illustrated in skeleton form the essential elements 4Spciicatn of Letters Patent,

`oneend with flanges, as A',

7 Patent-ea Jan. 15, 1907.

apparatus whereby my process may be conducted. I build a rilie-pipeA in short sections, (marked As) rIlhesef sections `may be made of any suitable material and'supported upon a platformor trestle so that the `entire pipe slopes from its intake to its outlet end, the inclination being about'one foot in ten.

,In each4 ofthe sections A there is secured a `riiiie-plate B, which is-placed at a slight angle to the axis of the's'ection itself, so that when the 'entire pipeis set upk these riiflepla'tes should stand l nearly level. The riHe-pipe is so inclined that the riiiies B have a slight inclination' from the horizontal, this inclination being ysullicient to compensate for the frictionbetween the stream and the rime, so that the streamfshall be nearly at uniformy depth over the entire rifle-surface. Each ofthe rifle-sections protrudes. from the lower end of .thesec-tion lto whichit is attached,` so that it .overhangs the next suclceeding.- riflie-section, y as at C. The lower endy ofthe riiel-pipe delivers into a tank, as G, which may be y.connected with recoveryboxes or other suitable' apparatus, which is not shown. The rilie-pipe sections A aref preferably made'interchangeable and. of convenient lengths `for handling-say "about eighteen vinches long and are provided at by which they are secured together. v The joints between the riffle-sections should be made tight at the bottom to prevent leakage. Instead of a lpipe the riflie-sections may, if desired, be

merely troughs; but I prefer the pipe form for the sake of the strength which that form lends to the entire apparatus and also because the upper portions of these pipes serve as convenient means for the attachment or insertion of auxiliary parts of the apparatus and at the same time protects the riflies against the accidental admission of foreign matter.

When the pipe form of apparatus is employed, it is well to provide coveredhandholes, as at A2, for the insertion of a hose to wash out the riiiles. At the head of the rifflepipe there is placed the ore-delivery hopper H and devices for feeding the ore in a uniform stream upon the riffle-plates, the device indicated in the drawing being a shaking platform or table whose forward lip projects over the head of the head riflie-plate B. The head-section of the rifiie-pipe is suitably joined to a supply-pipe W, through which the cyanid solution is fed so as to flow out upon IOO IOS

ITO

stream of ore falling the riffle-plate where it mingles with the from the table T and carries the same down over the rifiies. The rifile-plates B are provided with transverse ridges, as B, which form pockets wherewith to retard and arrest the insoluble ingredients of the ore mixture. The particles of ore carry with them on falling into the stream of cyanid solution a fairly liberal quantity of' air for oxygenating purposes; but I provide also an air-pipe E, which enters the solutionpipe at or near the .point of delivery to the riffles, and through this pipe E, I blow air, preferably through a strainer-head,y as E, so that the solution is caused to foam with bube bles and to be in a state of froth when it comes in contact with the ore. Furthermore, in order to reoxygenate the mingled stream of `ore and cyanid I provide other air-pipes, either downwardly directed upon the mingled stream, as at'F, or directed against the stream, as by thepipe D, which delivers at D just behind the cascade which falls from one riffie-plate B to the next, asy at C. The mingled stream is thus not 1only caused to iow over the riffles. and be agitated thereby in contact with the air in the pipe, but is more or less forcibly filled with air, which is forced into the stream at frequent intervals through the entire pipe. The downwardlydirected air-pipes, as F', preferably deliver their streams of air into the transverse troughs between the rime-ridges, so that they serve not only to force air into the stream, but also to keep the insoluble concentrates in a condition of local agitation, thus facili tating and promoting the process of cyanid-` ing.v The air-pipes F may be multiplied as found desirable, even to the extent of having a row of air-pipes delivering air and forcing it I into the stream at each of the transverse riffle-plate troughs. Again, the delivery ends i D of the pipes D may with advantage be placed so that they are bathed with the solu- I tion falling from one. rime-plate section to another, thus insuring an intimate mixture of air with the liquid which forms the stream. When the riffle-plates have collected their maximum charl e of insoluble concentrates, the operation o the apparatus is suspended,

and the riffle-pipes are then washed out, first by a gentle stream, which washes out the cyanid solution into the tank G, and thenfby a forcible stream, which effectually `cleans the rifies, the concentrates from this washing being delivered to a separate settling-tank for subsequent treatment.

What I claim, and desire to secure by Letters Patent, is#

1. In an apparatus for cyaniding ores, a

riffle, means to deliver a stream of ore and a stream of cyanid solution upon the rifiie, and

`meansto mingle air with the mingled ore and cyanid solution.

2. In an apparatus for cyaniding ores, a rifle, means to deliver a stream of ore and a stream of cyanid solution upon the riflie, and air-pipes, to introduce air into the mingled stream of' ore and cyanid solution. l

3. In an apparatus for cyaniding ores, a series of rifHe-plates, the foot of each in the series overhanging the head of the next, means to deliver a stream of ore and a stream of cyanid solution upon the head riifle-plate, an air-.pipe delivering into the cyanid solution in advance of the point where the ore and cyanid mingles, air-pipes, downwardly directed on the stream on the riiiies, and

other air-pipes, directed across the gaps where therifile-plates overhang.

Signed by me at. Boston, Suffolk county, 

